Electric tooth brush

Abstract

This is an electro-mechanical tooth brush having opposed sets of bristles specifically designed to simultaneously brush both the inner and outer surfaces of the teeth by reciprocating one set back and forth, and also having a central hub element for brushing the chewing surfaces of the teeth fixed to and moving with the reciprocating set of bristles.

What is claimed is: 
     
       1. An electro-mechanically reciprocated tooth brush comprising, a casing,   an electric motor housed within said casing,   a reciprocating rod slidably mounted at one end of casing for back and forth movement therein,   means associated with said electric motor and said casing for producing back and forth reciprocation of said rod when said motor is energized,   stationary bristles concentrically surrounding the axis of said rod in radially outwardly spaced relation thereto and mounted in fixed relation to said end of said casing,   reciprocating bristles fixed to said rod in generally opposed relation to said stationary bristles for back and forth movement relative to said stationary bristles to simultaneously brush the inner and outer surfaces of the teeth positioned between said stationary and reciprocating bristles.   
     
     
       2. The structure set forth in claim 1 and a sleeve fixed to said rod and positioned between said bristles and having cylindrical bristles fixed thereto for reciprocation with said rod to simultaneously brush the biting surfaces of the teeth during brushing of the inner and outer surfaces. 
     
     
       3. The structure set forth in claim 2 wherein said reciprocating bristles are disposed further from said casing than said stationary bristles.